Question

Hi..I m BACK... Solve this.... And please don't FOLLOW me...thanks

Answer 1

1. True, bcz.. sound requires a medium to travel through. Since vacuum is divoid of any medium, sound cannot travel through it.

2.  False, Loudness of sound is proportional to the square of amplitude of its vibration.

3. True, Unwanted and unpleasant sounds are known as noise. If one is subjected to loud unpleasant sound  continuously for a long time, then it may cause temporary hearing impairment.

4. False, Since sound is a proper wave, a material medium is absolutely necessary for its propagation.

5. True, 1 vibration per second

HOPE IT HELPS U..

PLZ.. MARK AS A BRAINLISTS,....

Answer 2

Answer:

MY INTRO BEHNA

MY NAME::ADITYA DHALL

LOCATION:::DELHI,SANGAM VIHAR

CLASS::::9

SCHOOL:: NEW GREEN FIELD SCHOOL

AT LAST I HAVE REPORTED YOUR ALL ANS. BEHNA

REPORT MY ANS. TOO OTHERWISE HOW WOULD I WILL SPEND TIME WITH YOU AND CAN YOU TELL ME WHEN YOU ARE ONLINE